MAP/MAF - Throttle Position Correlation
The ECU detects implausibility between throttle position and the airflow or intake manifold pressure measured. At a given throttle angle the air mass deviates beyond rationality limits.
Affected components
- Throttle position sensor
- Mass air flow sensor
- Manifold absolute pressure sensor
- Intake manifold
- Throttle body
Common causes
- High likelihood: Large unmetered vacuum leak
- Medium likelihood: Throttle body dirty or sticking
- Medium likelihood: MAF sensor drift
Possible symptoms
- Check engine light on
- Power loss, hesitation under acceleration
- Rough or unstable idle
- Increased fuel consumption
- Possible difficulty starting
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.